期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 2, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.107079
关键词
Seeding; Grey relational; B-ZSM-5 zeolite membrane; Acetone/water separation; Pervaporation
Optimization of seeding conditions can lead to the synthesis of high quality B-ZSM-5 zeolite membrane with a low template, enhancing the membrane's pervaporation performance.
Synthesizing zeolite membrane using a templating method is often expensive and consumes a lot of energy. Therefore, the synthesis of a high quality B-ZSM-5 zeolite membrane using a low organic template would be required. Here, the synthesis of the low-template B-ZSM-5 zeolite membrane was performed on the surface of alpha-alumina support modified by TiO2-Bohemite via secondary growth technique under the optimized seeding conditions. A multi-objective optimization method was utilized to identify the optimal support seeding parameters to enhance the performance of the synthesized membrane. Optimization of seeding conditions leads to achieving well intergrowth zeolite membrane with the low template by applying fewer layers. The prepared membrane with a thickness of less than 10 mu m showed a high pervaporation performance with a high acetone/water separation factor of 500 and a total flux of 0.13 kg m(-2) h(-1) for the 1 wt% acetone/water mixture at 333 K and 260 mmHg. The impacts of feed temperature, permeate pressure, and feed concentration on the pervaporation performance, total fluxes as well as membrane separation factor, were investigated. Our results revealed that the separation factor could be significantly increased by increasing the permeate pressure.
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